Appeared in 75 commercials and hundreds of magazine catalogues by the time she was 12.

Received death threats after The Exorcist (1973) premiered. Warner Brothers, the studio which released the film, hired the police to live with the Blair family for 6 months. The culprit was never caught.

Dated Rick Springfield.

Flew to Florida to attend funerals for members of the band Lynyrd Skynyrd, when an acquaintance convinced Linda to go with her and buy cocaine. Blair reportedly went because she was interested in buying pedigree puppies which the dealers were supposedly selling. Blair reportedly bought cocaine, and then returned to Connecticut. She kept in touch with the dealers, supposedly because she wanted the puppies, but the Drug Enforcement Agency was tapping the phones. They arrested Blair, along with 30+ others, and charged her with conspiracy to buy the cocaine in Florida and sell it in Connecticut. Police searched her purse, found amphetamines, and then charged her with possession. The possession charge was dropped, and the conspiracy charge was reduced. She received three years probation.

Her father, James, was an executive headhunter. Her mother, Elinore, was a real estate agent. She has a bother, Jimmy, and a sister, Debbie.